'use strict'
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/**
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* Adds requests to the queue. If a timeout has been added to the queue then
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* this will freeze the queue with the newly added item, flush it, and then
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* unfreeze it when the queue has been cleared.
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*
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* @param {object} message An LDAP message object.
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* @param {object} expect An expectation object.
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* @param {object} emitter An event emitter or `null`.
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* @param {function} cb A callback to invoke when the request is finished.
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*
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* @returns {boolean} `true` if the requested was queued. `false` if the queue
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* is not accepting any requests.
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*/
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module.exports = function enqueue (message, expect, emitter, cb) {
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if (this._queue.size >= this.size || this._frozen) {
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return false
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}
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this._queue.add({ message, expect, emitter, cb })
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if (this.timeout === 0) return true
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if (this._timer === null) return true
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// A queue can have a specified time allotted for it to be cleared. If that
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// time has been reached, reject new entries until the queue has been cleared.
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this._timer = setTimeout(queueTimeout.bind(this), this.timeout)
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return true
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function queueTimeout () {
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this.freeze()
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this.purge()
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}
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}
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